(adjective) marked by transparency; pellucid / (adjective) clear and simple in style / (adjective) absolutely serene and untroubled
A limpid dawn had completely unsheathed one side of the empty street.
within the limpid facets of which, had I been a better crystal-gazer, I might have seen a room, people, lights, trees in the rain—a whole period of émigré life for which that ring was to pay
The draw of children’s literature may lie in the language as much as anything. These books have a total limpidity—a close, clean material attention that makes you feel like you’re reading a catalog description of a world to be entered at will
"total" is a weird adjective to use here